shithub: libgraphics

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add some instrumentation to measure pipeline stage time.

--- a/camera.c

+++ b/camera.c

@@ -21,6 +21,16 @@

 }

 static void

+updatetimes(Camera *c, Renderjob *j)

+{

+	c->times.R[c->times.cur] = j->times.R;

+	c->times.E[c->times.cur] = j->times.E;

+	c->times.Tn[c->times.cur] = j->times.Tn;

+	c->times.Rn[c->times.cur] = j->times.Rn;

+	c->times.cur = ++c->times.cur % nelem(c->times.R);

+}

+

+static void

 verifycfg(Camera *c)

 {

 	assert(c->vp != nil);

@@ -98,6 +108,7 @@

 	t1 = nanosec();

 	c->vp->fbctl->swap(c->vp->fbctl);

+	updatetimes(c, job);

 	chanfree(job->donec);

 	free(job);

--- a/graphics.h

+++ b/graphics.h

@@ -29,6 +29,7 @@

 typedef struct SUparams SUparams;

 typedef struct Shadertab Shadertab;

 typedef struct Renderer Renderer;

+typedef struct Rendertime Rendertime;

 typedef struct Renderjob Renderjob;

 typedef struct Framebuf Framebuf;

 typedef struct Framebufctl Framebufctl;

@@ -175,6 +176,11 @@

 	Channel *c;

 };

+struct Rendertime

+{

+	uvlong t0, t1;

+};

+

 struct Renderjob

 {

 	Ref;

@@ -183,6 +189,10 @@

 	Shadertab *shaders;

 	Channel *donec;

+	struct {

+		Rendertime R, E, Tn, Rn;

+	} times;

+

 	Renderjob *next;

 };

@@ -234,6 +244,11 @@

 		uvlong min, avg, max, acc, n, v;

 		uvlong nframes;

 	} stats;

+

+	struct {

+		Rendertime R[100], E[100], Tn[100], Rn[100];

+		int cur;

+	} times;

 };

 /* camera */

--- a/render.c

+++ b/render.c

@@ -361,6 +361,7 @@

 	Rastertask *task;

 	SUparams *params;

 	Memimage *frag;

+	uvlong t0;

 	threadsetname("rasterizer");

@@ -368,6 +369,8 @@

 	frag = rgb(DBlack);

 	while((task = recvp(taskc)) != nil){

+		t0 = nanosec();

+

 		params = task->params;

 		/* end of job */

 		if(params->entity == nil){

@@ -379,6 +382,9 @@

 			continue;

 		}

+		if(params->job->times.Rn.t0 == 0)

+			params->job->times.Rn.t0 = t0;

+

 		params->frag = frag;

 		rasterize(task);

@@ -385,6 +391,7 @@

 		delvattrs(&task->t[0]);

 		delvattrs(&task->t[1]);

 		delvattrs(&task->t[2]);

+		params->job->times.Rn.t1 = nanosec();

 		free(params);

 		free(task);

 	}

@@ -406,6 +413,7 @@

 	Channel **taskc;

 	ulong Δx, nproc;

 	int i, nt;

+	uvlong t0;

 	threadsetname("tilerdurden");

@@ -416,6 +424,10 @@

 	wr = emalloc(nproc*sizeof(Rectangle));

 	while((params = recvp(tp->paramsc)) != nil){

+		t0 = nanosec();

+		if(params->job->times.Tn.t0 == 0)

+			params->job->times.Tn.t0 = t0;

+

 		/* end of job */

 		if(params->entity == nil){

 			if(decref(params->job) < 1){

@@ -543,6 +555,7 @@

 				delvattrs(&t[nt][2]);

 			}

 		}

+		params->job->times.Tn.t1 = nanosec();

 		free(params);

 	}

 }

@@ -557,6 +570,7 @@

 	char *nprocs;

 	ulong stride, nelems, nproc, nworkers;

 	int i;

+	uvlong t0;

 	threadsetname("entityproc");

@@ -584,6 +598,10 @@

 	}

 	while((params = recvp(paramsin)) != nil){

+		t0 = nanosec();

+		if(params->job->times.E.t0 == 0)

+			params->job->times.E.t0 = t0;

+

 		/* end of job */

 		if(params->entity == nil){

 			params->job->ref = nproc;

@@ -611,6 +629,7 @@

 			newparams->ee = i == nworkers-1? ee: newparams->eb + stride;

 			sendp(paramsout[i], newparams);

 		}

+		params->job->times.E.t1 = nanosec();

 		free(params);

 	}

 }

@@ -634,9 +653,9 @@

 	proccreate(entityproc, paramsc, mainstacksize);

 	while((job = recvp(jobc)) != nil){

-		sc = job->scene;

 		time = nanosec();

-

+		job->times.R.t0 = time;

+		sc = job->scene;

 		if(sc->nents < 1){

 			nbsend(job->donec, nil);

 			continue;

@@ -658,6 +677,8 @@

 		memset(params, 0, sizeof *params);

 		params->job = job;

 		sendp(paramsc, params);

+

+		job->times.R.t1 = nanosec();

 	}

 }